Duplicating machine



March 10, i936.

A.l MARcHEv DUPLICATING MACHINE -Filed June l5, 1955 7 Sheets-Sheet l,am Mfg,

arch 10, E936. A. MARcHEv 2,033,333

DUPLICA-TING MACHINE Filed June l5, 1935 '7 Sheets-Sheet 2 wuw .7Sheets-Sheet 5,

A. MARCHEV DUPLICA'TING MACHINE Filed June l5, 1 935 March 10, 1936.

Manch 10, 1936. A. MARcHEv DUPLICATING MACHINE Filed June 15, 1935 7Sheets-Sheet March 10, 1936. A. MARCHEV DUPLICATING MACHINE 7Sheets-Sheet 5 Filed June 15, 1935 @E L I 72%7? for,

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A. MARCHEV 2,033,383

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Patented Mar. 10, 1936 DUILICATING MACHINE Alfred Marchey, La Grange,Ill., assignor to Ditto, incorporated, Chicago, Ill., a corporation ofWest Virginia Application Julie 15, 1935, Serial No. 26,714

"17 Claims.

This invention relates to duplicators and more particularly toduplicators of the rotary type such for example as that 'shown in theco-pending application 713,590, led March 1, 1934, by John W. Hernlund,Alfred Marchev, and Robert S. Morri- 'SOIL- In the general operation ofthe machine disclosed in this application, it is very much the same asthe machine disclosed in the prior application just mentioned.

While the invention of the present application is disclosed inconnection With a machine of the type shown in the prior application, itis to be understood that the invention is not limited to use With thatmachine only, but may be employed With advantage in duplicating machinesof other types and in printing devices as a general class.

The invention contemplates the provision in a duplicating machine of anovel stripping mechanism whereby separate sheets laid on theduplicating drum may be stripped at different times in order that theentire surface of a long drum may be utilized although the sheetsapplied thereto are much narrower than the length of the drum.

To this end, the invention contemplates the prol vision of a strippingmechanism made up in a plurality of sections which sections may operateat different times during the rotation of the drum to Astrip the sheetsfrom the drum. In the particular form of the invention disclosed, a pairof stripping members are employed in conjunction with stripping rollers,and these stripping members are alternately operable upon each rotationof the drum so as to strip from the drum the narrow sheet alignedtherewith.

Other objects and features of the invention will become apparent fromthe following description, reference being had to the accompanyingdrawings in which Fig. l is a plan View of a duplicating machine whichembodies the invention;

Fig. 2 is a sectional View on the line 2 2 of Fig. l;

Fig. 3 is a sectional view on the line 3 3 of Fig. l;

Fig. 4 is a sectional View on the line 4 4 of Fig. 3;

Fig. 5 is a fragmentary sectional View taken on the line 5 5 of Fig. 4;

Fig. 6 is a fragmentary plan View partly in section of a portion of astripping mechanism;

Fig. 7 is a fragmentary sectional View on the line 'I 'I of Fig. 5;

Fig. 8 and Fig. 9 are fragmentary sectional (o1. iol-132) views taken onthe line 8 8 of Fig. 1 and showing the alternative positions of thestripping members;

Figs. 10, 11, and 12 are fragmentary side elevations demonstrating theoperation of the strip- 5 ping members together and separate.

Referring first to Figs. 1, 2, 3, and 4, there is shown a duplicatingmachine of the type disclosed in the prior application above mentioned.This duplicating machine preferably comprises a cabinet Il] upon which aframe I I is mounted, the duplicating mechanism proper being mounted inthe frame Il. The frame II comprises tWo side frames I2 and I3 suitablysecured together and providing a support for `duplicating drum I4. 15The drum I 4 is supported upon a pair of stub shafts I5 and I6 asdescribed in the prior application, these shafts being suitablyjournalled in the side frames I2 and I3. The power for rotating drinn I4is obtained from an electric motor 20 I7 through a gear reducing box I8and gears I9 and to gear 2 I. Gear 2l is rotatable upon shaft I6, but isadapted to be connected to the shaft I6 by means of clutch members 22,23 so as to rotate the shaft I6 therewith. End members 24 and 25 of thedrum I4 are secured to shafts I5 and I 6 directly so that, upon rotationof shaft I6, drum I 4 will be rotated therewith. Shaft I5 has anoperating handle 25 for manually turning the drum Whenever desired forpositioning it. Shaft I6 has a gear 21 thereon which meshes with a gear28 on a shaft 29 which shaft carries a stripping roll 30. Stripping roll30 and its companion roll 3| are journalled in a pair of auxiliary sideframes 32 and 33 as described in the prior appli- 35 cation hereinbeforementioned.

The drum I 4 has mounted therein a pair of spindles 34 and 35 forreceiving a gelatin band 36 Which is stretched around the drum I4 toprovide a duplicating surface thereon. As indicated 40 most clearly inFig. 2, drum I4 is open on its surface from the point 3l to a point 38.This opening is utilized in connection with the stripping mechanismalthough it is a common structure in duplicating machines of thischaracter.

A suitable gearing mechanism indicated at 39 in Figs. 2 and 3 has beenprovided for moving the gelatin band on the drum, but this mechanismforms no part of the present invention and will, therefore, not befurther described.

The machine is also provided with a platen roller 4! and a paper feedingmechanism including a paper feed table 4 I. 'Ihis mechanism, however,also is of no importance to the present invention and, therefore, willnot be further described.

The general operation of the paper feed mechanism and the drum issubstantially the same as that disclosed in the prior application and,for the purposes of this invention, I will just generally describe thefeeding of a sheet to the drum and the operation after that through tothe stripping of the sheet in order that the present invention may befully understood.

When a sheet of paper is fed from the feed table 4|, it is applied tothe gelatin band with its forward end projecting over the point 38 wherethe gelatin band enters the drum when the drum is rotated in thedirection of the arrow indicated in Fig. 2. Platen roller 49 presses thesheet down upon the band. When the master sheet is applied, this sheetis held on the drum any desired amount of time and passed underneath theplaten roller several times if desired by utilizing an'operating lever42 to prevent stripping of the master sheet from the drum.

Referring now to Figs. 8 and 9 in connection with Fig. l, this actionwill be more clearly'understood. Operating lever 42 is connected to alink 43 which in turn is connected to an. arm 44 pivoted at 45 to theside frame I2. VLink 43 carries a pin 46 (see Fig. l) which pin isadapted to engage hooks 41 and 48 on members 49 and 58 holding thesemembers back so as to position a pair of stripping bars I and 52connected to members 49 and 5B respectively back over the upperstripping roll 3| in the position shown most clearly in Figs. 2 and 9 sothat the stripping bars are out of the path of the forward end of amaster sheet on the drum.

Stripping barsl5| and 52 are mounted for separate movement. A shaft-54is keyed to a member 55 which is journalled in the frame V32, and thismember 55 has an arm 55 thereon which arm carries the stripping bar 5 I.Bar 5| extends from the arm 56 parallel to the stripping rolls towardthe center of the drum. Stripping bar 52 extends from the other end ofthe drum toward the center thereof, the two bars being slightly Vspacedat the center as indicated at 53 in Fig. 5. A sleeve 51 surrounds theshaft .54, and, where the sleeve and shaft pass through the auxiliaryframe member 33, a member .58 surrounding them is journalled in theframe 33 and carries an arm`59 upon which thestripper bar 52 is mounted.A pin 69 keys the member 58 and the sleeve 51 together. Beyond the endof the drum toward the side frame I2, sleeve 51 has the member 50 keyedthereto, and the shaft 54 has the member 49 keyed thereto. An arm 6| onthe member 50 .carries a roller 62 for engagement with a cam 63 fixed tothe end 24 of the drum I4. Member 49 has an arm 64 which carries aroller 65 also riding upon the cam 63. Member 55 has a depending arm 66to which a spring 61 is secured for yieldingly urging the stripping bar5I toward the drum, and the member 58 carries a depending arm 68 towhich a spring 69 is secured for yieldingly urging stripping bar 52toward the drum. It is understood, of course, that springs 61 and B9 aresecured to the frame members 32 and 33, respectively.

Tracing now briefly the structure described, it will be seen thatstripperbar 5I is connected by means of arm 56 tomember 55 and urgedtoward the drum by spring 61. Member 55 in turn is connected by means ofshaft 54 to member 49 and arm 64 so that roller 65 riding on cam 63prevents movement of stripping bar 5I into strippingposition orengagement with the duplicating surface of drum I4. Similarly, strippingbar 52 is carried by arm 59 and yieldingly urged toward the drum byspring 69. Sleeve 51 connects member 58 and member 5!) so that roller 62carried on arm 6I holds stripping bar 52 away from the duplicatingsurface when roller 62 is on the cam 63. So long as nothing isinterposed to prevent their operation, rollers 62 and 65 will strike theend of cam 63 in the position illustrated in Fig. 8 so that the stripperbars 5|`and 52 will move outwardly as the rollers ride over the end ofcam 63 into the position shown in Fig. 9, stripper bars 5| and 52 movingin unison in this operation so as to provide a stripping barsubstantially throughout the length of the drum I4.

Means are provided to hold bars 5| and 52 in the position shown in Fig.9 through a complete revolution of the drum when desired. This meansconsists of a star wheel 18 (see Figs. 4, '1, and 10 to 12). points 1I,12, and 13 lying in one plane While the other three points 14, 15, and16 lie in another plane closer to the end frame I2 of the machine.

Both sets of points are mounted upon a common hub 11 which hub is xed toa shaft 18 rotatably and slidably mounted in a bearing 18 on the frameI2. Points 14, 15, and 16 are, in the normal-operating position of starwheel 18, in alignment with arm 64 which is provided with a shoulder at19 adapted to engage one of the points 14, 15, and 16 as illustrated inFig. 4. Points 1I, 12, and 13 are aligned with a projecting member 80 onthe member 58.

It is evident that, when one of the points 1| to 16 is in engagementwith its respective mem-- ber 19 or 89 as shown in Fig. 4 or Fig. '1,the point will operate to hold member 49 or member 50 in position toprevent movement of the stripper bars `5I and 52 into the drum. A pawlmember '8| (see Figs. 4 to 6) is pivoted upon side frame I2 and isnotched at 82 to form a stop means for the points on the star wheel 10.A spring 83 connected to pawl 8| at one end by means of a pin 84 andconnected to side frame I2 at its other end by means of a. pin 85yieldingly urges the pawl against the points of the star wheel.

Means is provided on the drum I4 for advancing the star wheel 18 onestep, that is, one-sixth of a revolution for each rotation of the drumin its normal direction of operation. This means consists of a springpressed pawl 86 pivotally secured upon a post 81 projecting from endfa'ce 24 of the drum. 'Ihis pawl 85 has the face 88 for engagement withone of the points of the star Y wheel as the drum rotates so as to causeadvancement of the star wheel one step. A stop pin 89 limits movement ofthe pawl 86 in one direction, and a spring 9B yieldingly opposesmovement of the pawl in the opposite direction so that the drum may bereversed in direction Without rotating star wheel 18, it being obviousthat the pawl 8G will ride o-ver the points of the star Wheel when thedrum is rotated in the reverse direction from that shown in Fig. 4.

When it is desired to free the stripping mechanism of the influence ofstar wheel 10, thefstar wheel is moved toward the frame I2 Yby slidingshaft 18 in its bearing 18'. A handle 9| is provided on the end of shaft18 for this purpose. Also shaft 18 is provided with a pair of spacedgrooves 92 and 93 (see Figs. 5 and 6) to be engaged by a spring pressedball 94 mounted in the ybearing 18 so as to hold shaft 18 either in op-Star wheel is made up with three 20 Figs. 8 and 9, there is illustratedthe manner of opera tion of the two stripping bars 5I and 52 when a widesheet is being used on the drum. In this case both rollers 62 and 65engage upon cam 63, and star wheel 10 is out of the line of the arms 19and 80 so that, when rollers 62 and 65 move off the end of cam 63 whichis curved as indicated at 63 in Fig. 4, both stripper bars 5| and 52move into the open side of the drum, and, when rollers 65 and 62 strikethe advancing face of cam 53, both stripping bars are moved outwardly inthe manner illustrated in Figs. 8 and 9 to strip the wide sheet from theduplicating surface of the drum.

Now, however, when it is desired to alternately strip narrow sheets fromthe drum as illustrated in Figs. 10 and l1 of the drawings, the starwheel 10 is moved into operative position so that its points are alignedwith the members 19 and 80. Two narrow sheets are fed to the drum sideby side, and, during the rst rotation of the drum, one of the points 14,15, or 16 will engage the portion 19 which is connected to arm 64carryingroller 65 and hold this roller from dropping down into the pathof the cam 63. This prevents the shaft 54 from turning and preventsstripping bar 5| from entering the drum. Therefore, only stripping bar52 will function and only one sheet will be stripped from the machine inthe first rotation.

On the second rotation of the drum, another sheet is fed onto the sidefrom which the sheet was just stripped, and, upon this second rotationof this drum, one of the points 1I, 12, and 13 has been positioned bypawl 86 moving the star wheel to engage with the arm and thus hold camroller 62 out and prevent stripper bar 52 from returning into the drumafter it has stripped its sheet. The action of the drum is continued inthis fashion with the stripping mechanism operating to alternately stripthe narrow sheets from the drum, ea'ch sheet remaining on the drum fortwo revolutions thereof, and a new narrow sheet being fed at eachrevolution of the drum, but to alternate sides thereof. When it. isdesired to return to stripping wide sheets, it is only necessary to pullout on the handle 9| to move star wheel 10 out of position, and the twobars 5l and 52 then function as a single stripping bar in the samefashion as the stripping bar in the prior application above referred to.

The stripping rollers deliver the sheet to a receiving tray beneathguide bar 96 which are substantially like that shown in the priorapplication. The mechanical operation of the drum and its associatedparts including the guide bar 96 and the feeding mechanism for feedingsheets to the drum as well as the means for controlling the rotation ofthe drum may well be precisely the same as illustrated in the priorapplication above referred to. The description of this mechanism,therefore, has not been placed in the present application since it isbelieved to be unnecessary to the understanding of the presentinvention.

While one embodiment of the invention has been shown and described, itis to be understood that it is capable of many modifications. Changes,therefore, in the construction and arrangement may be made withoutdeparting from the spirit and scope of the invention as disclosed in theappended claims, in which it is the intention to claim all noveltyinherent in the invention as broadly as possible in view of the priorart.

What I claim as new and desire to secure by Letters Patent is:

1. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a -duplicating surface thereon, andstripping means for stripping sheets from said drum, said strippingmeans comprising a pair of members spaced lengthwise of the drum andoperable at different times to separately strip sheets laid side by sideon said drum.

2. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, andstripping means for stripping sheets from said drum, said strippingmeans comprising a pair of members spaced lengthwise of the drum andoperable at different times to separately strip sheets laid side by sideon said drum, and means to operate said members together to strip asingle wide sheet from said drum.

3. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein, a pair of stripping rollers adjacent said drum, apair of stripping members spaced lengthwise of said drum and movableinto and out of position to direct sheets from said drum to saidrollers, said members being operable at different times to separatelystrip sheets laid side by side on said drum.

4. In a duplicating machine, a frame, an irnpression drum rotatablyjournalled therein, a pair of stripping rollers adjacent said drum, apair of stripping members spaced lengthwise of said drum and movableinto and out of position to direct sheets from said drum to saidrollers, said members being operable at different times to separatelystrip sheets laid side by side on said drum, and means synchronized withsaid drum operating said members alternately.

5. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein, a pair of stripping rollers adjacent said drum, apair of stripping members spaced lengthwise of said drum and movableinto and out of position to direct sheets from said drum to saidrollers, and means foi` alternately operating said members insynchronism with the rotation of said drum whereby to alternately stripsheets laid side by side on said drum.

6. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, andstripping means for stripping sheets from said drum, said strippingmeans comprising a pair of members spaced lengthwise of the drum andoperable at different times to separately strip sheets laid side by sideon said drum, said members comprising a. pair of stripping bars carriedby said frame and movable toward and away from said drum.

7. In a duplicating machine, a frame, an impressio-n member therein andhaving a` duplicating surface thereon, stripping mechanism for strippingsheets from said surface, said stripping mechanism being provided withseparately operable stripping members, and means to operate saidstripping members individually to strip sheets from. said impressionmember.

8. In a duplicating machine, a frame, an impression member therein andhaving a duplicating surface thereon, stripping mechanism for strippingsheets from said surface, said stripping mechanism being provided withseparately operable stripping members, and means to operate saidstripping members individually to strip sheets from said impressionmember, said stripping members being spaced longitudinally along saidimpression member whereby tol remove sheets from separate portions ofsaid duplicating surface.

9. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, said strippingmechanism being provided with separately operable stripping members, andmeans to operate said stripping members individually to strip sheetsfrom said drum.

10. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, said strippingmechanism being provided with separately operable stripping members, andmeans synchronized with said drum to operate one of said strippingmembers upon each rotation of said drum.

11. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and .having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, said strippingmechanism being provided With separately operable stripping members, andoperating means for said stripping members comprising cam meansrotatablewith said drum, control means individual to each strippingmember engaging said cam means to control the stripping movement of itsstripping member, and a second member actuated by rotation of said drumto prevent one of said control means from engaging the drum on eachrotation thereof.

12. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, said strippingmechanism being provided with separately operable stripping members,springs urging said members toward the drum, a cam rotatable with thedrum, means connected with the stripping members and engaging said camto periodically move said stripping members outwardly from said drum,and means actuated by the drum for alternately holding said members awayfrom the drum for one rotation of the drum independently of said cam.

13. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, said strippingmechanism being provided with separately operable stripping members,

springs urging said members toward the drum, a

cam rotatable with the drum, means connected With the stripping membersand engaging said cam to periodically move said stripping membersoutwardly from said drum, and means actuated by the drum for alternatelyholding said members away from the drum for one rotation of the drumindependently of said cam, and manually operable means for renderingsaid last named means functionally inoperative.

14. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, said strippingmechanism being provided with separately operable stripping members,springs urging said members toward the drum, a cam rotatable with thedrum, means connected With the stripping members and engaging said camto periodically move said stripping members outwardly from said drum,and means actuated by the drum for alternately holding said members awayfrom the drum for one rotation of the drum independently of said cam,manually operable means for rendering said last named means functionallyinoperative, and a second manually operable means for holding saidstripping members out of functionally operative position.

15. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, comprising a pair ofstripping rollers, stripping bars mounted for independent movement fordirecting sheets from said surface to said rollers, means including acam on said drum for causing stripping movement of said bars, and meansactuated by said drum for preventing stripping movement of one bar uponeach rotation of the drum.

16. In a duplicating machine, a frame, an impression drum rotatablyjournalled therein and having a duplicating surface thereon, strippingmechanism for stripping sheets from said surface, comprising a pair ofstripping rollers, stripping bars mounted for independent movement fordirecting sheets from said surface to said rollers, means including acam on said drum for causing stripping movement of said bars, and meansactuated by said drum for preventing stripping movement of one bar uponeach rotation of the drum, said last named means comprising a star wheelmounted on said frame,

causing stripping movement of said bars, andf means actuated by saiddrum for preventing stripping movement of one bar upon each rotation ofthe drum, said last named means comprising a star Wheel mounted on saidframe, `means on the drum for advancing the star Wheel one step for eachrotation of the drum, and means Xed to said bars for alternatelyengaging the` points of said star Wheel, and manually operable means formoving said star Wheel out of alignment with said last named means.

ALFRED MARCHEV.

